Coaster-brake for motor-cycles.



F. S. ELLETT.

COASTER BRAKE FOR MOTOR CYCLES.

APPLICATION FILED JUNEZG, 19|2.

Patented Sept. 28, 1915.

UNITED sTATns f FAT r rREDERIcKs; \ELLETT, or ELMIRA, NEW YORK.

seamen-BRAKE Eon noron oYcnns.

i Specification of Letters Patent.

Patented se ia. as, 1915.

Application filed June 26, 1912; 7 Serial No. 706,110.

To all whom it may concern:

Be it known that I, FREDERICKS. ELLETT, a citizen of the United States residing at Elmira, county of Chemung, and State of New York, have invented certain new and useful Improvements in Coaster-Brakes for Motor-Cycles, of which the following is a specification. 1

This invention relates to coaster brakes and more particularly to coaster brakes for use on motor cycles.

One of the objects of the invention; is to provide a coaster brake having a large retarding surface whereby the action of the brake is effected with a moderate amount of applied force and the wear on the rubbing surfaces of the brake is greatly reduced.

Another object of. the invention is to provide a brake of this character which may be assembled or disassembled without disturbing the adjustment of the bearings for-the wheel. a I

Other objects and the features of novelty of the invention will be apparent from the following description taken in connection with the accompanying drawingsin which:

Figure 1 is a longitudinal section through the brake; Fig. 2 is a composite view, onehalf of which is anelevation of theleft hand end of Fig. 1 and the other half of which is a section on the line-aa of Fig. 1, with oertain parts broken away.

Referring to the drawings, 10 indicates a wheel axle having threaded endportions 11 and 12. A bearing cone 13 is arranged on the threaded portion 12 of the axle and may be heldin position by means of the lock nut 14. A member 15is arranged on thethreaded portion 11 of the axle and is provided with the axiallyextending grooves 16 which are engaged by. projections 17 on thediskor member 18. The member 15 is also provided at its inner end with the transversely V extending slot 19 in which are arranged the outwardly projecting arms 20 carried by a ring 21 which surrounds "the axle '10. The inner end of themember 15 is screw threaded and has arranged thereon the I bearing cone 22. A driving member 23 is rotatably mounted on the bearing cone 13 by means of the balls 24. Onthe exterior of the inner end of the driving member'23 is a ball race 25 in which are arranged the balls 26.

The hub 27' of the wheel is rotatably mounted on the balls 26 and the balls 28 which run on the cone 22.' The hub 27 is conveniently arranged a series of friction disks. The disks 36 may be provided with outwardly projecting teeth or lugs which engage suitable recesses 37 in thefiange 33 and the CllSkS 38 which are alternately arranged with the disks 36 may be provided with inwardly projecting teeth orlugs which en gage sultable grooves 39 in the member 18.

The member 18 may also be provided with an outwardly extending flange 40 which forms an abutment for the flange ilon a ring 42 and holds the ring on the end of said member. The flange 41 may be provided withiinwardly projecting teeth or lugs 41 similar to those on disks 38 for the purpose of preventing the ring 12 from rotating on the member 18. V

The member15 may be provided at its outer end with a reduced rectangular hub 43 which receives an arm 44, this arm having 11380111361 end fixed to the frame or any other suitable part of the motor cycle. By this i 3 construction the members 15 and 18' and the ring 42 and thedisks 38 will be securely held againstrotation. It will also be observed by removing the arm 14: and the end plate 3 1 the member 18, the disks 36 and 38 and the ring 40 may be readily removed without disturbing the bearings or other parts of the hub.

The driving member '23 carries a suitable driving wheel 45 which may be of-any de-' sired construction and may be held in position linany suitable manner as by means of 'the screw threads 46 and the lock nut 47. r The wheel 31 may be similarly secured to the hub 27. The driving member has its inner end internally threaded as at 4:8 and in engagement with the corresponding external threads onan axially movable sleeve 49. The sleeve 19 is provided with a conical 'flan'ge 50 which is adapted to cooperate with the conical inner surface of the rib 51 on the hub 27 to. form a driving connection between the sleeve 49 and the hub. The inner sideof the flange 50 is provided with a recess 52 having a conical surface o adapted to en-- gage the conical end of a sleeve 54 which surrounds the axle 10. An extension 55 on the sleeve 49 projects into recess 56 in the end 7 of the sleeve 54 and a slip ring 57 having one end connected with the extension. 55 is arranged between this extension and the sin- {rounding portion of the sleeve whereby the sleeve 49 is frictionally held by-the sleeve '54 With sufficient force to permit the driving member 23 to be rotated on the sleeve 49 when the flange 50 is out of engagement With the ribgandthe end of the sleeve 54.

The sleeve 54 extends through the hub and has its opposite end bearing againstthe ring 21. Pins 58-are secured in the member .15

andproject radially into slots'59 in the end of the sleeve 54 and thereby hold the sleeve I against rotation but permitting it to be moved longitudinally on the axle 10.

V 729 ii I Thesprocket 321spreferably driven by the The operation of the brake isas follows:

engineand the Wheel is driven by means of the usual pedals which are provided on a a .motor cycle; By referring to Fig.1 it Will.

be; seen that whenthe- Wheel 45 is rotated in one, directionthe sleeve49 will be drawn into engagement with the rib 51 and form; a driving connection between the member 23 and thehub-so thatithe rider may propel the ve- Zhicle by means ofthe pedals. When-the on .gine drives sprocket 32 the sleeve 49 is auto- 'matically shifted to a position Where the hange is outof engagement With the rib 51. The Wheel 45 may then remain sta-- tionary. When it is desired to use the brake,

' the Wheel 45isrotated iii-the opposite'directiongfrom that firstnientioned (by back pedaling) and this will move the sleeve49 to- Ward-the left, as seen in Fig; 1, into engage ment' vviththe sleeve 54 and move this sleeve against jthering21.'v Further movement of the sleeve 49 Will move the ring 21 and the member 18'Wl110l1 is engaged by the arms 20 on the ring '21 soas to clamp the friction disks 36 and 88 between the ringg42' and the I ;end plate-34. Since the disks 36 rotate with the hub andthe disks :88 are held against rotation it ,Will be seen that by clamping these disks together they =Will'actas a brake to retard the Wheel. j r 1 By arranging the disks'36 andn38' inthe chamber between the end-plate34and the wheel 81 itwv-rvill be seenthat the disks are :thoroughly protected from dirtfand this 'Ol'la'HIbGIij'WlllfllSO serve as a convenient. re- =ceptacle for lubricant to lubricate the disks fiso as to prevent excessive Wear thereon.

' I-Iaving thus described-my invention what .I claimlis': V I V i1.';I;n:a coaster brake, the combination of a stationary member, a hub, a driving member forthe hub, La bearingfor one end of the eliubcarried by said stationary member, a

bearing for theotherend of the hub carried rbyzsaidvidriving member, a friction disk carated.

" tion "ried by said hub exterior'lyof said bearings,

a nonrotatable friction disk, a member adapted to be nioved axlally and rotated by said driving member and axially movable non-rotatable means actuated by said lastmentioned member for moving one of sa d friction disks into gripping engagement "with the 05116111 2. 1n a coaster a stationary axle member, a driving member rotatably mounted". on ,said axle member, a

lacuna-bearing on said axle member for one or th hulna bearing on salddrivlng' the otner end OfSlld hub, means v end of said hub forming an '1 P, annular chamber, a non-rotatable member naming a closure at the innercircumferaid chamber, a friction disk card along side of said first mentioned d sk ann-carriedby saidnon-rotatable member, am means extending through the int of said hub for movingsaid nonr ilo member axially to move one of s Miction disks against the other.

In a coaster brake, thecombination of a sta ionary axle member, a drnnng member rotatably mounted on said axle member, a

hub, a bearing for one end of said hub on said stationary membena bearing' for the other end of said hub on said drivingmemher, a wheelcarriedby said hub atone end thereof and having van'yaxiallv extending flange, a plate secured to: said flange and forming with said Wheel an annular cham ber arianged exteriorly of said bearings, a friction disk -1n said chamber and carried by said Wheel, a non-rotatable member, a

second ,frictionrdisk carried by said nonrotatable member and arranged in said chamber, a sleeve surrounding said Iaxle member Within the hub and connectedwith said; nonrotatable member, and means actuby said driving member for imoving sleeveiaxially to press one of said fricdisses against the other.

4 ulna coaster brake, the combination of said a stationaryaxle member, a driving'member. rotatably mounted on said axlemember and having: a sprocket Wheel secured .thereto, a

member adiustably mounted on said a-Xle "member, means for holding said last mentioned member a ainst rotation a hub friction disks carried by said last mentioned member and alternately'arranged With respect to said first'ment oned frictiond sks,

iction disks carried by brake, the combination of e bearings for said hub arranged attheend'sv.

and means for moving said non-rotatable member axially to press said friction disks into gripping engagement.

5. In a coaster brake, the combination of a stationary axle member, a driving member rotatably mounted on said axle member and having asprocket Wheel secured thereto,'a stationary member mounted on said axle member and-provided With radial slots, a hub, bearings for said hub, an axially movable member, a plurality of friction disks carried by said hub, a plurality of friction disks alternately arranged with respect to said first mentioned disks and carried by said axially movable .member, a second axially movable member having arms projecting through said slots and engaging said first mentioned axially movable member, and means actuated by said driving member for moving said second axially movable member to press said friction disks into gripping engagement.

6. In a coaster brake, the combination of a stationary axle member, a driving member rotatably mounted on said axle member, a

hub, bearings for said hub, a non-rotatable axially movable member, a plurality of friction disks carried by said hub, a plurality of friction disks carried by said non-rotatable member and alternately arranged With respect to saidfirst mentioned disks, a member axially movable on said axle member and having arms engaging said nonrotatable member, and means extending through y the interior of said hub and adapted to be moved axially to press said friction disks.

into gripping engagement.

7. In a coaster brake, the combination of a stationary axle member, a driving member rotatably mounted on said axle member, a

hub having a bearing at one end thereof on I said axle member and a bearing at the other end thereof on said driving member, a wheel removably secured to said hub and having an axially extending flange, an end plate se cured to said flange and forming with said Wheel an annular chamber, an axially movable non-rotatable member mounted on said axle member and having radial projections Within said chamber, a plurality of friction friction disks into gripping engagement.

In testimony whereof I allix my signature in presence of tWo Witnesses.

FREDERICK S. ELLETT.

Witnesses: I

a J. L. FERGUSON,

LEAH M. JOHNSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

